<template>
    <div class="song-list">
        <!-- 导航栏 -->
        <van-nav-bar
        title="歌单详情"
        left-text="返回"
        left-arrow
        @click-left="onClickLeft"
    />
         <!-- 歌单首部 -->
        <div class="header">
           <img :src="song.logo" alt="" />
           <h4>{{song.dissname}}</h4>
           <div class="nick">
               <img :src="song.headurl" alt="" />
               <span>{{song.nickname}}</span>
            </div>
            <span>播放量:{{song.visitnum|numFilter(1)}}万</span>
        </div>
        <!-- 歌单列表 -->
        <div class="list">
        <van-list
        v-model="loading"
        :finished="finished"
        finished-text="没有更多了"
        @load="onLoad"
        >
        <div v-for="(item,index) in list" :key="index" :title="item" class="song">
            <h3>{{item.songname}}</h3>
            <div class="singers">
                <span v-for="(singer,index) in item.singer" :key="singer.id">
                    {{singer.name}}
                    <span v-show="index!=item.singer.length-1">/</span>
                </span>
                    <span v-show="item.albumname">
                        <span>·</span>
                        <span>{{item.albumname}}</span>
                    </span>
                </div>
            </div>
        </van-list>
    </div>
    </div>
</template>

<script>
export default {
    data(){
        return{
            song:{
                dissname:"",//标题
                logo:"",//歌单logo
                headurl:"",//歌单制作者头像
                nickname:"",//歌单制作者昵称
                visitnum:0,//歌单播放量
            },
            songlist:[],//歌曲列表
            songnum:0,//歌曲列表数目
            list: [],
            loading: false,
            finished: false,

        };
    },

    created(){
        this.getListData()
    },
    methods:{
        getListData(){
            this.$request("get","/songlist?id="+this.$route.params.id).then(
                (res)=>{
                console.log(res);
                this.song.dissname = res.data.dissname;
                this.song.logo = res.data.logo;
                this.song.headurl = res.data.headurl;
                this.song.nickname = res.data.nickname;
                this.song.visitnum = res.data.visitnum;
                this.songlist = res.data.songlist;
                this.songnum = res.data.songnum;
            }
          );
        },
        onClickLeft(){
            window.history.length > 1 ? this.$router.go(-1) : this.$router.push('/')
        },
        onLoad(){
            setTimeout(() =>{
                this.list = this.list.concat(this.songlist.splice(0,10))
                this.loading = false;
                if(this.list.length >= this.songnum){
                    this.finished = true;
                }
            },1000);
        },
    },
    filters:{
        numFilter(value,num){
            return parseFloat(value/10000).toFixed(num)
        }
    }
};
</script>

<style scoped>
.header > img {
    width: 50%;
    border-radius: 1rem;
}
.nick{
    overflow: hidden;
}
.nick > img {
    width: 1.5rem;
    border-radius: 50%;
    margin-right: 0.5rem;
}
.nick > span {
    height: 2rem;
    display: inline-block;
    vertical-align: middle;
    font-size: 0.8rem;
}
.header > span {
    font-size: 0.9rem;
}
.song{
    margin-bottom: 1rem;
}

.song>h3{
    text-align: left;
    font-size: 1rem;
    padding: 0 2rem;
    margin: 0;
}

.singers{
    text-align: left;
    padding: 0 2rem;
}

.singers span{
    font-size: 0.8rem;
    color: grey;
}

.singers>span:nth-last-child(1)>span:nth-child(1){
    margin: 0 0.3rem;
    font-weight: 900;
    color: red;
}

</style>